Nationwide Series driver Nelson Piquet Jr. tweeted an apology Saturday for kicking Brian Scott during a scuffle on pit road following Friday's race at Richmond International Raceway.

Piquet kicked Scott in the groin after the two drivers tangled during the race and then slammed into each on the cool-down lap. Scott confronted Piquet on pit road, and Piquet shoved him and then kicked him as the two drivers scuffled.